Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
The average high-temperature during August registers at a still moderately hot 80.8°F (27.1°C), maintaining a close resemblance to the previous month. Coal Valley experiences a mean low-temperature of 63°F (17.2°C) during August.Heat index
For most parts of August, the heat index is evaluated at a hot 86°F (30°C). Extended exposure and activity might lead to tiredness, potentially resulting in heat cramps.Evaluating the heat index requires understanding its values in the shade and with gentle winds. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Humidity
In Coal Valley, the average relative humidity in August is 80%.Rainfall
In Coal Valley, in August, during 7.6 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. Throughout the year, in Coal Valley, Illinois, there are 75.2 rainfall days, and 5.79" (147mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Coal Valley, the average length of the day in August is 13h and 47min.On the first day of the month, sunrise is at 5:57 am and sunset at 8:18 pm. On the last day of August, in Coal Valley, sunrise is at 6:27 am and sunset at 7:35 pm CDT.
Sunshine
In Coal Valley, the average sunshine in August is 9.8h.UV index
In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In August, the maximum UV index of 5 translates into these guidelines:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Coal Valley in August?
What is the average humidity in August in Coal Valley?
How much does it rain in Coal Valley in August?
When it does not snow in Coal Valley?
What is the average length of the day in August in Coal Valley?
When is the sunrise / sunset in August in Coal Valley?
How long on average sun shines in August in Coal Valley?
What is the UV index reading in August in Coal Valley?
Average temperature in August
Coal Valley, IL
- Average high temperature in August: 80.8°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).
- Average low temperature in August: 63°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16°F).
Average pressure in August
Coal Valley, IL
- Average pressure in August: 29.97"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in August
Coal Valley, IL
- Average wind speed in August: 6.7mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).
Average humidity in August
Coal Valley, IL
- Average humidity in August: 80%
The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in August
Coal Valley, IL
- Average rainfall in August: 0.28"
The wettest month (with the highest rainfall) is May (0.94").
The driest month (with the least rainfall) is December (0.24").
Average rainfall days in August
Coal Valley, IL
- Average rainfall days in August: 7.6 days
The month with the highest number of rainy days is May (10.4 days).
The month with the least rainy days is January (1.8 days).
Average snowfall in August
Coal Valley, IL
- Average snowfall in August: 0"
The month with the highest snowfall is January (1.06").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in August
Coal Valley, IL
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (5.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Coal Valley, IL
- Average daylight in August: 13h and 5min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in August: 9h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in August
Coal Valley, IL
- Average sunshine days in August: 20.3 days
The month with the most sunshine days is December (25.8 days).
The month with the least sunshine days is June (15.4 days).
Average UV index in August
Coal Valley, IL
- Average UV index in August: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in August
Coal Valley, IL
- Average cloud cover in August: 30
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in August
Coal Valley, IL
- Average visibility in August: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Coal Valley, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location